<script lang="ts" name="TopCategory" setup>
import useStore from '@/store'
import { storeToRefs } from 'pinia';
import { watch, watchEffect } from 'vue';
import { useRoute } from 'vue-router'
import GoodsItem from './components/goods-item.vue'
const { category, home } = useStore()
const route = useRoute()
// console.log(route.params.id)
// vue2
// this.$routes

// vue3 
// useRoute

// watch(() => route.params.id, () => {
//   if (!route.params.id) return
//   // route.fullPath === `/category/${ route.params.id }` 严谨的处理方法
//   category.getTopCategory(route.params.id as string)
// }, {
//   immediate: true // 首次加载
// })

watchEffect(() => {
  // if (!route.params.id) return
  if (route.fullPath !== '/category/' + route.params.id) return
  // 清空数据
  category.resetTopCategory()
  // 再发请求
  // 这里获取的是一级分类
  category.getTopCategory(route.params.id as string)
})

home.getBannerList()

// Pinia 的解构, 需要配合 storeToRefs 才能保证响应式的特性
const { topCategory } = storeToRefs(category)

</script>

<template>
  <div class="top-category">
      分类组件
      <!-- provide 和 inject 的作用是注入数据, 例如在 bread 上注入的数据, 所有的子子孙孙组件都可以通过 inject 访问 -->
      <!-- 以下嵌套关系也支持通过 inject 访问 -->
        <XtxBread>
          <XtxBreadItem to="/">首页</XtxBreadItem>
          <XtxBreadItem>{{ category.topCategory.name }}</XtxBreadItem>
        </XtxBread>
      <div class="container">
        <!-- 轮播图 -->
        <XtxCarousel :slides="home.bannerList" style="height: 500px;" auto-play/>

        <!-- 所有二级分类 -->
        <div class="sub-list">
          <h3>全部分类</h3>
          <ul>
            <li v-for="item in topCategory.children" :key="item.id">
              <a href="javascript:;">
                <img v-lazy="item.picture" />
                <p>{{ item.name }}</p>
              </a>
            </li>
          </ul>
        </div>

        <!-- 分类关联商品 -->
        <!-- transtion 必须仅有一个子元素或组件, 如果不能满足条件时使用 div 包裹即可 -->
        <transition name="fade">
          <div v-if="topCategory.children">
            <div class="ref-goods" v-for="item in topCategory.children" :key="item.id">
              <div class="head">
                <h3>- {{ item.name }} -</h3>
                <p class="tag">温暖柔软，品质之选</p>
                <XtxMore />
              </div>
              <div class="body">
                <GoodsItem v-for="goods in item.goods" :key="goods.id" :goods="goods" />
              </div>
            </div>
          </div>

          <div v-else>
            <div class="ref-goods" v-for="i in 5" :key="i">
              <div class="head">
                <h3><XtxSkeleton :height="30" :width="300" animated /></h3>
                <p class="tag"></p>
                <XtxSkeleton style="position: absolute; right: 20px; top: 40px;" :height="21" :width="70" animated />
              </div>
              <div class="body" style="display: flex; justify-content: space-between;">
                <XtxSkeleton :height="300" :width="200" animated v-for="item in 5" :key="item" />
              </div>
            </div>
          </div>
        </transition>
      </div>
  </div>
</template>

<style scoped lang="less">
.top-category {
  h3 {
    font-size: 28px;
    color: #666;
    font-weight: normal;
    text-align: center;
    line-height: 100px;
  }
  .sub-list {
    margin-top: 20px;
    background-color: #fff;
    ul {
      display: flex;
      padding: 0 32px;
      flex-wrap: wrap;
      li {
        width: 168px;
        height: 160px;
        a {
          text-align: center;
          display: block;
          font-size: 16px;
          img {
            width: 100px;
            height: 100px;
          }
          p {
            line-height: 40px;
          }
          &:hover {
            color: @xtxColor;
          }
        }
      }
    }
  }
}

.ref-goods {
    background-color: #fff;
    margin-top: 20px;
    position: relative;
    .head {
      .xtx-more {
        position: absolute;
        top: 20px;
        right: 20px;
      }
      .tag {
        text-align: center;
        color: #999;
        font-size: 20px;
        position: relative;
        top: -20px;
      }
    }
    .body {
      display: flex;
      justify-content: flex-start;
      flex-wrap: wrap;
      padding: 0 65px 30px;
    }
  }
</style>
